Valve-gear for combustion-engines.



P. E 0 LAWRBNZ VP LVE GEAR FOR COMBUSTION ENGINES.

A-BPLIOATION FILED AUG.3, 1911.

Patented Oct. 21, 1913.

/zwen80r PAUL ROBERT CARL mwnnnz, or COLOGNE, GERMANY.

VALVE-GEAR FOR COMBUSTION-ENGINES.

Specification of Letters Patent.

Patented Oct. 21, 19'] Application filed August 3, 1911. Serial No. 642,174'

T 0 all whom it may concern Be it known that I, PAUL Ronnnr CARL LAwnENz, a Slll)]0t of the Emperor of Germany, residing at 1 Kuniherrskloster, Co-

logne-on-thealthine, Germany. have invented certain new and useful iizi rovements in Valve-Gears for COIllbllSUflt, Engines, of which the following is a specification.

This invention relates to valve gears for combustion engines and its chief object is to provide a. valve gear of simple construction and arrangement.

The accompanying drawing shows in Figure 1 an elevational view-of the subject matter of the invention and av partial sectional view of the head of the cylinder. Fig, 2 represents a plan view of the new device.

The combustion engine, one end of which is illustrated'in the drawing, is provided with a controlling shaft l: adapted to be rotated by the main shaft of the engine (not illustrated) in the known manner at half the speed of the latter. The free end of the controlling shaft penetrates a bearing plate (see Fig. 2) and is positioned within the bearing plate in a bearing 2'. The end of the controlling shaft projecting beyond this bearing 5 carries a plurality of cam plates arranged closely one behind the other and packed tightly in a suitable manner in order to serve for the movement of the individual valves.

The bearing plate f is screwed to a bracket-arm g of the cylinder and carries two pins c and h. Mova-bly mounted o-. the pin 0 is a lever a the end of which is adjusted in a downwardly direction and carries a roller running upon one of the aforesaid camplates of the end of the controlling shaft, and the upper free end of the lever a engages the valve regulating the feed of the fuel to the combustion chamber of the engine. In addition to the lever a a crank arm d is also movably mountedupon the pin 0 and is provided with fork-shaped ends which engage a rod 0. This rod 0 carries at its lower end a roller running upon one of the aforesaid cam plates and leading to the valve (not illustrated in the drawing) permitting the admission into the cylinder of the fuel to be drawn into the engine. A bell-crank lever I) also movably mounted upon pin (1 is adapted to restupon one of the cam plates one end of the lever being provided with rollers, the other end of the said bell-crank lever being adapted to operate a valve serving for the admission of the compressed air into the chamber of the cylinder.

The pin h mounted upon the bearing plate 7 carries a double armed lever adapted to be turned, and this lever controls the outlet valve of the engine and is actuated also by means of one of the aforesaid camplates.

The cams of the cam plates are as shown in Fig. 1, arranged relatively at certain predetermined angles. The different rollers also come into engagement at different times with the different points of the circumferences of the cams. These relative adjustments of the rollers and the cams are selected in such manner that. upon the rotation of the controlling shaft in the direction ind cated by the arrow, the. different valves are successively and properly closed for the time being and for the length of time required for the operation of the engine.

The essential feature of the present invention consists in the fact that all the bearing points for the operation of the different controlling members are mounted upon a. single bearing plate. of the controlling shaft, so that these controlling members are adapted to be aecuratelv centered toward the center of the controlling shaft.

Even if the operation of the engine is contemplated in accordance with some other arrangement, i. (2, by means of some other valve'gears these new valve gears may be easily placed in position by exchanging the bearing plate without requiring any changes to be made in any other parts of the engine.

What I claim and desire to secure by Letters Patent is:-

1. A valve gear for combustion engines comprising a pin, a lever for controlling the fuel valve, a lever for controlling the starting valve, a rod for controlling the inlet valve, a crank having one end connected to said rod, said levers and said crank being mounted on said pin, and means for operating said levers and said rod.

2. A valve gear for combustion engines comprising a pin, a lever for controlling the fuel valve, a lever for controlling the starting valve. a rod for controlling the inlet valve, a crank having one end connected to said rod, said levers and said crank being mounted on said pin, and a cam shaft for operating said levers and said rod.

3. A valve gear for combustion engi.

comprising a supporting plate, a pin mounted on said supporting plate, a lever for controlling the fuel valve, a lever for controlling the starting valve, a rod for controlling the inlet valve, a crank having one end connected to said rod, said levers and said crank being mounted on said pin. and means for operating said levers and said rod.

4. A valve gear for combustion engines comprising a supporting plate, a pin mounted on said supporting plate, a lever for controlling the fuel valve, a lever for'controlling the starting valve, a rod for controlling the inlet valve, a crank having one end connected to said rod, said 'levers and said crank being mounted on said pin, and a cam shaft journaled in said supporting plate for operating said levers and said rod.

5. A valve gear for combustion engines comprising a supporting plate adapted to be reinovably attached to a bracket on the cylinder of the engine, a pin mounted on said supporting plate, a lever for controlling the fuel valve, a lever for controlling the starting valve, a rod for controlling the inlet valve, a crank having one end connected to said rod, said levers and said crank being mounted on said pin, and means for operating said levers and said rod.

6. A valve gear for combustion engines comprising a supporting plate adapted to be removablv attached to a bracket on the cylinder of the engine, a pin mounted on said supporting plate, a lever for controlling the fuel valve, a lever for controlling the starting valve, a rod for controlling the inlet valve, a crank having one end connected to said rod, said levers and said crank being mounted on said pin, and a cam shaft journaled in said supporting plate for operating said levers and said rod.

In testimony whereof I affix my signature in presence of two Witnesses.

PAUL ROBERT CARL LAWRENZ.

Witnesses OSCAR DEPNER, LOUIS VANDORN. 

